Short description of error
Sometimes (it happens two times), when moving or adding a camera, it doesn't show in the viewport, instead a glitchy thing show, when going to it with numpad . . It isn't possible to move it, or anything. And even by restarting the project, it's still glitchy, don't know what to do. And even duplicating a camera, or adding another one, they are all glitchy, except the camera that I added before.

Exact steps for others to reproduce the error
I don't know exactly how I did it, I just added a camera and it goes glitchy, really sorry for this. I think it is a problem with a move in orthographic view. But you can see what it gives by going to the .blend file, and Numpad . on the Camera.005, to see it :